1225111132 has 36 divisors (see below), whose sum is σ = 2504507040. Its totient is φ = 522830784.

The previous prime is 1225111117. The next prime is 1225111141. The reversal of 1225111132 is 2311115221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33768 + ... + 59920.

It is an arithmetic number, because the mean of its divisors is an integer number (69569640).

Almost surely, 2^1225111132 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1225111132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1252253520).

1225111132 is an abundant number, since it is smaller than the sum of its proper divisors (1279395908).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1225111132 is a wasteful number, since it uses less digits than its factorization.

1225111132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26410 (or 26401 counting only the distinct ones).

The product of its digits is 120, while the sum is 19.

The square root of 1225111132 is about 35001.5875639949. The cubic root of 1225111132 is about 1070.0198360081.

Adding to 1225111132 its reverse (2311115221), we get a palindrome (3536226353).

The spelling of 1225111132 in words is "one billion, two hundred twenty-five million, one hundred eleven thousand, one hundred thirty-two".